Axially movable rotary valve



Dec. 2, 1952 D, SHAEFFER 2,620,155

AXIALLY MovABLE ROTARY VALVE Filed Jan 26 1946 2 SHEETS- SHEET l\\\\\\\\\\\\\(\I`\\\\\ 5 Z/Q 25 /g .J 7 5 Z f2 'l Z /I l 74 I l 1N V ENTOR.

E E. i @fol-ge E faeffer;

BY M, YZUJ.

Dec. 2, 1952 G D, SHAEFFER 2,620,155

AXIALLY MOVBLE ROTARY VALVE Filed Jan. 26, 1946 2 SHEETS-SHEET 2 ff MPatented Dec. 2, 1952 AXIALLY MOVABLE ROTARY VALVE George D. Shaeler,Detroit, Mich., assignor to Gar Wood Industries, Inc., Detroit, Mich., a

corporation of Michigan Application January 26, 1946, Serial No. 643,621

6 Claims.

This invention relates to the valves for controlling uid under pressure.

The main objects of this invention are to provide a valve which can betightly seated in metal to metal contact to hold iluid under highpressure but which can be readily unseated with a minimum of operatingforce; to provide a valve having a tapered plug which moves axiallyduring the opening and closing movements so that in the closed positionit is in tight metal to metal contact with its seat and when in openposition there is a clearance between the plug and its seat; to providea valve of the foregoing character which may be readily adjusted tocompensate for wear; and to provide an improved means for adjusting thewear of the valve plug and seat without changing the relative angularpositions of the valve plug in the casing.

An illustrative embodiment of this invention is shown in theaccompanying drawings, in which,

Fig. 1 is a sectional view of the improved valve taken along the lineI-I of Fig. 2, looking in the direction indicated by the arrows andshowing the plug in closed position,

Fig. 2 is a sectional View taken on the line 2--2 of Fig. l, looking inthe direction indicated by the arrows,

Fig. 3 is a fragmentary sectional view taken on the line 3-3 of Fig. 2looking in the direction indicated by the arrows,

Fig. 4 is a View similar to Fig. 2 but showing the associated checkvalve in open position and with arrows indicating the ilow of uidthrough the valve with the plug in closed position,

Fig. 5 is :another view of the same but with the check valve closed,

Fig. 6 is another view of the same but with the plug valve rotated toopen position.

In the construction shown in the drawings, the improved valve comprisesa body 8 having an opening therethrough, a portion of which is taperedto form a valve seat I0. The tapered seat Ill is provided with ports I2and I4 positioned at diametrically opposed locations which communicatewith axially extending communicating passageways I6 and I6,respectively. The passageways I6 and I8 lead to a faced-ofi portion ofthe body -8 which surrounds the smaller end of the valve openingtherethrough.

The body 8 is recessed to provide a chamber 20 at the smaller end of thetapered valve seat opening and a disc-like closure plate 22 is securedthereover by a series of cap screws 24 for sealing that end of the valvebody. The closure plate 22 is provided with a diametrically extendingpassageway 26, closed at its ends by threaded plugs 28 and 30 andaxially extending passageways 32 and 34. The passageways 32 and 34register with the passageways I6 and I8, respectively, when the closureplate 22 is secured in place. The passageways 32 and 34 also communicatewith the passageway 26 and thus provide means for equalizing thepressure in the ports I2 and I4 at all times.

A tapered plug 36 is provided for co-operating with tapered valve seatI0 and is formed with diametrically extending segmental portions 38 and46 of greater circumferential extent than the ports I2 and I4, so as tooverlap and tightly close said ports with a metal to metal t when in theangular position shown in Figs. 1, 2, 4 and 5 and properly `adjustedaxially, as will be hereinafter more fully explained.

The smaller end of the plug 36 terminates adjacent the juncture of thetapered valve seat Ill and the chamber 20 so as to leave an unobstructedpassageway through the chamber 28 from a uid inlet passageway 42 to anoutlet passageway 44, both of which communicate with the valve seatopening through the body at diametrically opposed points locatedsubstantially at right angles to the ports I2 and I4.

The larger end of the plug 36 is provided with an axially extending,integrally formed, threaded shank 46 which terminates in a squaredportion 48 for receiving an operating handle whereby the plug may berotated.

The larger end of the valve seat opening through the body 8 is providedwith a circular cover 56 having an axially extending threaded openingtherethrough for receiving the threaded shank 46 of the plug valve 36.The cover plate 58 is provided with an axially extending integrallyformed collar 52 which surrounds the valve stem and the outer end ofwhich is interiorly recessed to receive an oil seal 54. A drainpassageway 56 is formed in the cover plate which provides communicationbetween an annular space 58 under the oil seal 54 and the plug openingwithin the valve body.

Means are provided for securing the cover plate 5D to the body 8 andcomprise an annular clamping ring 66 which overlaps the marginal edge ofthe plate 50 and a series of studs 62 extending through the openingsformed in the clamping ring. Each of the studs 62 has one end threadedinto the body 8 and a nut 64 on its other end which bears against theclamping ring 68.

The end of the body 8 which receives the cover plate 50 is formed sothat the plate 50 may be secured thereto at any selected angularposition.

The body 8 is also provided with a passageway 66 which communicatesthrough a spring pressed check valve 68 with a chamber lIII, whichhouses a spring l2 and a guide stem 14 mounted axially in a threadedclosure plug 16.

The chamber 'I0 is incommunicationwith the port I2 and with a passageway18 which'isthreadfed to receive a conduit leading to the unit or deviceto be operated or controlled by the valve as; sembly.

In the operation of this control valve, the cover metal contact in theposition shown in Figs'. 1

and 2 of the drawings with the cover tightly` clamped in position by thenuts 64.

When in this adjusted position, the valve,

opened by lefthand rotation with a control handle attached to thesquared end 48 of the valvestem and such lefthand .rotation causes theYvalve IlI` tomove axially away froml its valveseat atrthe same time thatthe segmental portions 38 andf40 are rotated sc as to uncover theponts.I2 and I4, respectively.

When it is desired to close the valve itis rotatedfin a righthand.direction and as .thesesmental 'portions 38 and 40 rotatel intoposition to close the ports I2 and I4, respectively, the valve plugas `awhole moves axially inwardag'ainst its tapered seat so as to forma,tightmetal tometal contact therewith .and thus effectfaclos'ure for -ahigh pressure line.

Duefto the communicating passageways I6, 32, 26 34 land I8, thepressures in the ports I2 and I4`."are` substantially. 'equal at alltimes.. thereby relieving the plug 36.irorn radialfpressurein onedirection only and which would tend to' bind the valve in its taperedvalve seat.

The oil seal 5Ilaround the /valveplug Astem is vented throughthepassageway.56.tofthe low pressure sideV of the system` at all times` so.that the seal is not subjected to destructive pressures.

It will be obviousthat as the 'contacting faces ofthe segmental portions38 andQ wearaway during use" and the' valve seat also wears away duringuse, the plug 36, .when rotated toclofsed position,` would no longer becentredmas. shown in.Fig. 2` of. the drawings. Such .wear maybecompensatedffor by loosening thein'uts64 and rotating the closurevplate50'in'a leithand direction so'as to move the valve an amountIeoualltotheamount of wear between the lvalveand its .seat andv Ithenreclamping itin the newly adjustedpo-` sitin... In this manner, .theplug may be main-- tained in its original angular position when lclosedregardless .-of the amount of wear.offtheY plug and' its seat.

What is claimed isz.

1. A valvecomprisinga bodyfhavinga tapered. valve seat thereinfandportsat"diametrically op. posite locations injsaidL-seat, a tapered'plug`for said seat adaptedtoclose said ports when inone angular position andto uncoversaidports when.

turned to another angular positionf,y a .member fixed to said body andthreadedly engaging said plug whereby relative angular movement ,betweensaid plug andrmember causes relativeaxial movement therebetwleen,. means4for securing.V said member to saidbodyin'any angular position rel-irative to said plug, (and, a 'manipulating .portion fast with respecttosaid plug and accessible from outside the body.

2. A valve comprising a body havingan opening therein providing atapered valve seat, a tapered plug for said valve seat, a threaded stemfast with respect to said plug, a cover plate for said body openinghaving a threaded opening therethrough for threadably receiving saidstem. and means for securing said cover plate on said body in anyselected angular position relative to said valve plug stem.

3, Avalve comprising. abody havingan opening therein providing a taperedvalve seat, said body having a port opening in said valve seat surface,aitapered plug for said seat adapted to close said 'port when in oneangular position and to uncover ksaidport when turned to another angularposition, a threaded stem fast with respect to.said plug, acover platefor said body opening having a threaded opening therethrough forthreadably receiving said stem, whereby relative angularV movementbetween said plug and cover plate causes relative axial movementtherebetween. andY means. forsecuring V said, cover; y.plate tosaidibody in any selected, angular positiongelative vvto said plugvalveA stem.-

4 Alvalve :comprisingfa hollow bodydeiining a valve chamber having aQtapered valveseat there. in .and portsrat diametricallgroppositelocations in. said seat a, tapered ..plug. valveLfor said5 seat adaptedto Y. close sai` dports when. in. one angular position and .to uncover.said portswhenffturned t another .areularmation.- a membertthread:edlly engaging said .plu'glwhereby relativefanglilar. mpvvementA.between4 said .plug and member causes relative axial-.movementtherebetween and means. for securing AIVsaid i memberj to said ,body ina se levied, @legalen pas.iligrtrelitti.vey t0 widows.; .said blyhaving;Pass@aways-therethrough @,Qmniunif.- @fitting-With. f Said. 1#rali/e. changea -if angular-1.5i spaced relation; withV respect-to saidl,Vallved,-ports, Said passageway#communicating.with each other at allPositions of .Saislplue .vali/e.

5. A valve comprising a body having anopenf, ine therethrough@rgvding a,valve tbambe-1f^r .and hai/inea tapered. valveeatlgsaid. wdr-.havingPOrUSfin Said. .valve-.seat surfaces@ diametriallr oppositelocationasaid. body. hai/.iria passageways. providing.CQmmunicatiQnbetween .Said @Orts .and a closure pla-te.. Surface,v at .one f end. 5tliercoi, 1a closure plate adapted to be secured origsaitsur;lface.andbavinaapassageway: therethrough-providingcommuniqaton. betweensaid. port-passager. ways for balancing the pressuresin said porftsatapered plug having diametricallypositioned'segmental portions..adapted-tol close. .Said ports :when in 911e. anaularpotion and. .to.uncover .Said-.ports when turned,.- to another angularpositiom athreaded stem` pnsaid plug, a coverplate ,having a threaded openingtherethrough-for receivingsaid threadedstem. and means for securing saidcover plate tosaid .body..in a `selected.angular position ,wherebyrgsaidqslug may .be positioned axially .to make-a metaltometal contactwith its seatwhen in port Vclosing angular position andis.withdrawn'from.-such. contact, when rotated to uncover .said ports,said. bodyhavingl passageways therethrough communicating', with -saidvalve ,chamber and positionedin angularlyspacedrelation...withvrespectto said .valved ports, said passagewayscommuni-cating` withy each ,other at. all times.y

6. A valve comprising `a hollowbody defining a valveychamber having atapered valve seatv therein ,andportsat diametrically oppositelocations` in said seat, ,a tapered plug lvalveforsaidseat adaptedy toclose` ,said ports in one ,angular posi. tiori,l and.. to open .saidports when 4,turned .to

another angular position, said body having Dassageways therethroughcommunicating with said valve chamber in angularly spaced relation withrespect to said valved ports, said passageways communicating with eachother at all positions 5 of said plug valve.

GEORGE D. SHAEFFER.

REFERENCES CITED The following references are of record In the le ofthis patent:

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